ANSWERS Mod 2.1 atoms worksheet 2024.pdf

ANSWERS Y9 Module 2.1 Atoms Worksheet 2024 1. Fill in the table to chemically describe each of the following substances Substance’s Name Chemical Diagram of symbol/formula substance’s chemical structure Is it an Element or a Compound? Does it form Molecules or Lattices? Oxygen gas O2 element molecul...

ANSWERS Y9 Module 2.1 Atoms Worksheet 2024 1. Fill in the table to chemically describe each of the following substances Substance’s Name Chemical Diagram of symbol/formula substance’s chemical structure Is it an Element or a Compound? Does it form Molecules or Lattices? Oxygen gas O2 element molecules Diamond C element lattice Sulfur S8 element molecule compound lattice Table salt (sodium chloride) Copper Cu element lattice Chlorine gas Cl2 element Molecule Gold Au element lattice C element lattice compound molecule Graphite (the “lead of a pencil) Water Buckyball Glucose DNA Ozone Sand (silicon dioxide) Carbon monoxide C60 element Molecule C6H12O6 compound molecule C10H12O5N5 compound molecule element molecule Compound lattice compound molecule O3 SiO2 CO Inside atoms 2. Label the parts of the atom on the diagram below. 3. Fill in the table of the relative masses and charges of each of the subatomic particles of an atom. Subatomic particle Location (where is it found in atom?) Mass (amu) Electric charge Proton In the nucleus Neutron 1 + 1 + 1/1836 - In the nucleus Electron In shells around the nucleus 4. What charge does the nucleus of an atom have (positive, negative or no charge)? Explain your choice. The nucleus of an atom has a positive charge because it contains protons (which have a positive charge) and neutrons (which have no charge). 5. Identify whether the following are ATTRACTED to each other, REPULSED by each other or if there is NO attraction or repulsion: a) protons (+) and an electrons (-): Attracted b) the nucleus of an atom and electrons (-): Attracted c) protons (+) and neutrons (n): No attraction or repulsion d) protons (+) and protons (+): repulsion e) electrons (-) and neutrons (n): No attraction or repulsion f) electrons (-) and electrons (-): repulsion g) neutrons (n) and neutrons (n) : no attraction or repulsion 6. a) Name the force that attracts opposite charged particles together. Electrostatic force b) Name the force that holds the protons in the nucleus and therefore stops the nucleus of an atom from splitting apart. Nuclear force Atomic number and mass number 7. Even though all atoms are composed of charged particles, all atoms are neutral. Explain what this statement means and why this is the case. This means that an atom itself is not charged positively or negatively. This is because the number of protons and electrons of any given atom are the same, so they cancel each other’s charges out, making the overall charge of the atom “0”. 8. Use your periodic table to complete the following. a) i) Mass Number =24 ii) #Protons =12 iii) # Neutrons = 12 b) i) Mass Number =12 ii) #Protons =6 iii) # Neutrons = 6 c) i) Mass Number =7 ii) #Protons =3 iii) # Neutrons = 4 d) i) Mass Number =40 ii) #Protons =19 iii) # Neutrons = 21 9. How many electrons and protons would be in the following atoms? a) Carbon (C): c) Chlorine (Cl): #protons 6 # electrons 6 b) Calcium (Ca): #protons 20 # electrons 20 #protons 17 # electrons 17 d) Copper (Cu): #protons 29 # electrons 29 e) Strontium (Sr): #protons 38 # electrons 38 f) Manganese(Mn):#protons 25 # electrons 25 g) Iodine (I): #protons 53 # electrons 53 h) Phosphorous (P): #protons 15 # electrons 15 10. Name the following common elements from the Periodic Table: a) Ca: Calcium c) S: Sulfur e) C Carbon g) H Hydrogen i) N Nitrogen b) Na Sodium d) Cl chlorine f) He Helium h) B Boron j) Be Beryllium 11. Write the atomic symbol for the following atoms using your period table. The first one has been done for you. Atom a. Carbon b. Manganese c. Xenon d. Uranium e. Iron f. Francium g. Chlorine Atomic symbol 12. Identify the following elements as either a metal or a non-metal. Element Metal or non-metal? Element Metal or non-metal? Fluorine Non-metal Titanium metal Iodine Non-metal Zinc metal Hydrogen metal Cadmium metal Helium Non-metal Bromine Non-metal Sodium metal Beryllium metal Ions 13. a) What is an “ion”? An ion is a charged atom. b) What is the name of an atom that has lost an electron, a cation or an anion? cation c) What is the name of an atom that has gained an electron, a cation or an anion? anion d) Which atoms lose electrons, metals or non-metals? metals e) Which atoms gain electrons, metals or non-metals? Non-metals f) Name the only atom can both lose or gain an electron: hydrogen 14. Use your periodic table to write the ion symbol for the following atoms. Atom/Ion Ion symbol A chlorine atom that has Is it a cation or an anion? Cl- anion O2- anion Fe2+ cation H- anion H+ cation N3- anion Na+ cation gained 1 electron An oxygen atom that has gained 2 electrons An iron atom that has lost 2 electrons A hydrogen atom that has gained 1 electron A hydrogen atom that has lost 1 electron A nitrogen atom that has gained 3 electrons A sodium atom that has lost 1 electron Electron configurations of atoms and ions 15. How is an ion different from an atom? An ion is an atom that has gained or lost electron(s) and is therefore charged. An atom is electrically neutral, meaning it has the same number of protons as electrons and has no charge overall. 16. What is the difference between a cation and an anion? A cation is an ion that has lost electrons to become overall positively charged, whereas an anion is an ion that has gained electrons to become overall negatively charged. 17. a) Which elements can become cations? metals b) Which elements can become anions? Non-metals c) Which elements usually never become ions at all? The Noble gases (Group 18) 18. How do cations form? Cations form when metal atoms lose electrons, becoming overall positively charged ions. 19. Write the electron configuration for: a) A sodium atom: 2, 8, 1 b) A sodium ion: 2, 8 20. How do anions form? Anions form when non-metal atoms gain electrons to become overall negatively charged ions. 21. Write the electron configuration for: a) A fluorine atom: 2, 7 b) Fluoride (a fluorine ion): 2, 8 Naming and Writing Ions 22. Fill in the table below with the name or chemical symbol for the following cations. Cation Name Cation Chemical Symbol Na+ Sodium ion Lithium ion Li+ Magnesium ion Mg2+ Copper II ion Cu2+ Potassium ion K+ Strontium ion Sr2+ Mn4+ Manganese ion Barium ion Ba2+ Iron (III) ion Fe3+ Aluminium ion Al3+ Hydrogen ion H+ 23. When naming a cation, how do I know when to use the Roman Numerals? If the metal ion has more than one possible charge, then you use roman numerals in the name of the ion to denote which charge of ion the cation is. 24. Fill in the table below with the name or chemical symbol for the following non-metal anions. Anion Name Anion Chemical Symbol hydride H- sulfide S2- phosphide P3- Iodide I- Nitride N3- Oxide O2- Bromide Br- Carbide C4- Chloride Cl-